US5008167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal metal oxide filled materials for electrophotographic devices
Assignee: Xerox Corp
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Filing: 1989-12-15
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Granted: 1991-04-16
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Expires: 2009-12-15
Abstract
Abstract In an electrophotographic imaging device, material for various exposed layers and members is provided having metal oxide particles homogeneously dispersed therein. The metal oxide particles provide coefficient of surface contact friction reduction, increased wear resistance, durability against tensile cracking, and improved adhesion of the layers without adversely affecting the optical and electrical properties of the imaging member. The metal oxide particles are three-dimensional, highly crosslinked network structures having an average particle size of about 200 Angstroms.
Inventors
- 👤 Robert C. U. Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:46
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/104; G03G5/102; G03G5/14; G03G5/142; G03G5/144; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
42 words
An electrophotographic imaging member comprising a layer containing homogeneously dispersed metal oxide particles with a particle diameter of about 30 Angstroms to about 1000 Angstroms, said metal oxide particles having been produced through internal precipitation in a coating solution for said layer.
Claim 2
Dependent Claim
42 words
An electrophotographic imaging member comprising a layer containing homogeneously dispersed metal oxide particles with a particle diameter of about 30 Angstroms to about 1000 Angstroms, said metal oxide particles having been produced through internal precipitation in a coating solution for said layer.
Claim 3
Dependent Claim
30 words
The imaging member of claim 1, wherein said layer is a ground strip layer comprising a film forming polymer binder, an electrically conductive grounding material, and said metal oxide particles.
Claim 4
Dependent Claim
29 words
The imaging member of claim 1, wherein said layer is a charge transport layer comprising a charge transport material, a film forming polymer binder, and said metal oxide particles.
Claim 5
Dependent Claim
29 words
The imaging member of claim 1, wherein said layer is an anti-curl back coating layer comprising a film forming polymer binder, an adhesion promoter, and said metal oxide particles.
Claim 6
Dependent Claim
25 words
The imaging member of claim 1, wherein said layer is an overcoating layer comprising an insulating or slightly semi-conductive polymer and said metal oxide particles.
Claim 7
Dependent Claim
41 words
The imaging member of claim 1, wherein said metal oxide particles are obtained from a solution of metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl, benzyl or phenyl group.
Claim 8
Dependent Claim
35 words
The imaging member of claim 1, wherein said metal oxide is at least one oxide of a compound selected from the group consisting of Si, Ti, Cr, Sn, Fe, Mg, Mn, Ni, Cu and Al.
Claim 9
Dependent Claim
33 words
The imaging member of claim 1, wherein said metal oxide is at least one member selected from the group consisting of SiO 2 , TiO 2 , and Al 2 O 3 .
Claim 10
Dependent Claim
18 words
The imaging member of claim 1, wherein the metal oxide is an oxide blend of Si and Ti.
Claim 11
Dependent Claim
19 words
The imaging member of claim 1, wherein said layer comprises about 1% to about 25% metal oxide by weight.
Claim 12
Dependent Claim
20 words
The imaging member of claim 1, wherein said metal oxide particles have an average particle diameter of about 200 Angstroms.
Claim 13
Dependent Claim
70 words
An electrophotographic imaging member comprising a ground strip comprised of a film forming polymer binder, a conductive grounding material, and metal oxide particles, said particles having been produced from a solution of metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl, benzyl, or phenyl group in a solution of said film forming polymer binder, and said conductive grounding material.
Claim 14
Dependent Claim
70 words
An electrophotographic imaging member comprising a ground strip comprised of a film forming polymer binder, a conductive grounding material, and metal oxide particles, said particles having been produced from a solution of metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl, benzyl, or phenyl group in a solution of said film forming polymer binder, and said conductive grounding material.
Claim 15
Dependent Claim
30 words
The imaging member of claim 12, wherein said internal precipitation comprises hydrolyzing said solution, and condensing said hydrolyzed solution to precipitate metal oxide particles of a highly crosslinked network structure.
Claim 16
Dependent Claim
23 words
The imaging member of claim 12, wherein said metal oxide particles have a particle diameter from about 30 Angstroms to about 1000 Angstroms.
Claim 17
Dependent Claim
19 words
The imaging member of claim 12, wherein said metal oxide particles are homogeneously dispersed in said film forming binder.
Claim 18
Dependent Claim
27 words
The imaging member of claim 12, wherein said metal is selected from the group consisting of Si, Ti, Cr, Sn, Fe, Mg, Mn, Ni, Cu and Al.
Claim 19
Dependent Claim
79 words
An electrophotographic imaging member comprising of a charge transport layer comprised of a film forming polymer binder, a charge transport compound and metal oxide particles, said particles having been produced by internal precipitation of metal oxide particles from a solution of metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl, benzyl or phenyl group in a solution of said film forming polymer binder and said charge transport compound.
Claim 20
Dependent Claim
79 words
An electrophotographic imaging member comprising of a charge transport layer comprised of a film forming polymer binder, a charge transport compound and metal oxide particles, said particles having been produced by internal precipitation of metal oxide particles from a solution of metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl, benzyl or phenyl group in a solution of said film forming polymer binder and said charge transport compound.
Claim 21
Dependent Claim
31 words
The charge transport layer of claim 17, wherein said internal precipitation comprises hydrolyzing said solution, and condensing said hydrolyzed solution to precipitate metal oxide particles having a highly crosslinked network structure.
Claim 22
Dependent Claim
24 words
The image member layer of claim 17, wherein said metal oxide particles have a particle diameter of about 30 Angstroms to about 1000 Angstroms.
Claim 23
Dependent Claim
21 words
The image member layer of claim 17, wherein said metal oxide particles are homogeneously dispersed in said film forming polymer binder.
Claim 24
Dependent Claim
28 words
The imaging member layer of claim 17, wherein said metal is selected from the group consisting of Si, Ti, Cr, Sn, Fe, Mg, Mn, Ni, Cu and Al.
Claim 25
Dependent Claim
73 words
An electrophotographic imaging member comprising an anti-curl back coating comprised of a film forming polymer binder, adhesion promoter, and particulate metal oxide particles, said particles having been produced by internal precipitation of particulate metal oxide particles from a solution of metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl, benzyl, or phenyl group in a solution of said film forming polymer binder.
Claim 26
Dependent Claim
73 words
An electrophotographic imaging member comprising an anti-curl back coating comprised of a film forming polymer binder, adhesion promoter, and particulate metal oxide particles, said particles having been produced by internal precipitation of particulate metal oxide particles from a solution of metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl, benzyl, or phenyl group in a solution of said film forming polymer binder.
Claim 27
Dependent Claim
30 words
The imaging member of claim 22, wherein said internal precipitation comprises hydrolyzing said solution, and condensing said hydrolyzed solution to precipitate metal oxide particles having a highly crosslinked network structure.
Claim 28
Dependent Claim
23 words
The imaging member of claim 22, wherein said metal oxide particles have a particle diameter of about 30 Angstroms to about 1000 Angstroms.
Claim 29
Dependent Claim
20 words
The imaging member of claim 22, wherein said metal oxide particles are homogeneously dispersed in said film forming polymer binder.
Claim 30
Dependent Claim
27 words
The imaging member of claim 22, wherein said metal is selected from the group consisting of Si, Ti, Cr, Sn, Fe, Mg, Mn, Ni, Cu and Al.
Claim 31
Independent Claim
139 words
A method of forming a layer of an electrophotographic imaging member, comprising: hydrolyzing a metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl, benzyl or phenyl, in a solution containing a film forming polymer binder to form a sol-gel structure in the solution; performing one of the steps (a) and (b): (a) precipitating the sol-gel structure having a loosely crosslinked network from said solution, and coating said precipitate-containing solution onto a supporting substrate to form a wet film; and (b) coating said solution and sol-gel structure onto a supporting substrate, and precipitating the sol-gel structure having a loosely crosslinked network from said coated solution to form a wet film; and condensing said wet film by drying to obtain a material having said metal oxide particles homogeneously dispersed therein.
Claim 32
Independent Claim
139 words
A method of forming a layer of an electrophotographic imaging member, comprising: hydrolyzing a metal alkoxide or aryloxide of the formula M(OR) 4 , wherein M is a metal and R is an alkyl, benzyl or phenyl, in a solution containing a film forming polymer binder to form a sol-gel structure in the solution; performing one of the steps (a) and (b): (a) precipitating the sol-gel structure having a loosely crosslinked network from said solution, and coating said precipitate-containing solution onto a supporting substrate to form a wet film; and (b) coating said solution and sol-gel structure onto a supporting substrate, and precipitating the sol-gel structure having a loosely crosslinked network from said coated solution to form a wet film; and condensing said wet film by drying to obtain a material having said metal oxide particles homogeneously dispersed therein.
Claim 33
Dependent Claim
22 words
The method of claim 27, wherein said metal oxide particles have a particle diameter from about 30 Angstroms to about 1000 Angstroms.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-15 | 1994-10-15 | 1995-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-15 | 1998-10-15 | 1999-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-15 | 2002-10-15 | 2003-04-16 | $7700.00 | Window Closed / Lapsed |